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YBM3A-12/0.4 series box-type substation

Classification:


Electrical products with voltage levels ranging from 3.6kV to 550kV, used for power generation, transmission, distribution, energy conversion, and consumption in the power system to provide on/off, control, or protection functions


Product Details


Overview
YBM3A-12/0.4 series prefabricated substation is designed and produced to meet the needs of domestic users. It has the advantages of compact structure, strong complete set, safe and reliable operation, convenient maintenance, beautiful appearance, small footprint, and convenient movement. Product performance reached the domestic advanced level.
 
Features
◆ The shell is designed with reference to foreign advanced technology and according to the actual situation. It has the characteristics of firmness, good heat insulation and ventilation performance, dustproof, anti-small animal, moisture-proof, beautiful appearance, convenient maintenance, etc. The shell material is aluminum alloy plate, steel plate, composite plate and other materials to choose from.
◆ The high-pressure side adopts air-pressure type, SF6 load switch or vacuum load switch, which has reliable anti-misoperation function. The transformer can be oil-immersed transformer, fully sealed transformer, dry-type transformer. The low-voltage side adopts the latest type of plastic shell automatic air switch, with high breaking capacity and good protection performance. Up to 30 YBM3A-12/0.4 outgoing circuits.
◆ Automatic reactive power compensation device can also be used when required by users.
◆ The substation is equipped with automatic control exhaust device, which can meet the requirements of high temperature areas. At the request of the user can also be equipped with anti-condensation dehumidification heating automatic control device to meet the special requirements of alpine regions.
◆ The substation is easy to install. The low-voltage room of the substation is equipped with a movable base plate, from which people can directly enter the cable trench.
◆ Substation has a variety of design options for selection.
◆ On the basis of ordinary box-type substation, it is decorated with embedded boards, ceramic tiles, etc. or other decorative materials according to user requirements. Can be made into a landscape box change.
 
Main technical parameters
◆ Rated voltage high voltage side 12kV
LV side 0.4/0.23kV
 
◆ Rated capacity 50-1250kVA
 
◆ Rated frequency 50Hz
 
◆ Rated short-time withstand current
High voltage 12.5kA/4S20kA/2S
Low voltage 200-400kVA15kA(1S)
  400-800kVA30kA(lS)
l000kVA and above according to the equipment used
 
◆ Rated peak withstand current
High voltage 31.5kA/50kA
Low pressure 200-400kVA/30kA
  400-800kVA/30kA(IS)
l000kVA and above according to the equipment used
 
◆ Rated closing current high voltage 31.5kA50kA
 
◆ Edge absolute level
high voltage switchgear:
Power frequency withstand voltage (to ground and phase/isolation fracture) 42/48kV
Lightning impulse withstand voltage (to ground and phase/isolation fracture) 75/85kV
Transformer
Power frequency withstand voltage (oil transformer/dry transformer) 35/28kV
Lightning impulse withstand voltage 75kV
LV switchgear
Power frequency withstand voltage
When the rated voltage is 60 ≤Ue≤ 300V, it is 2000V
2500V when rated voltage 300 ≤Ue≤ 660V
 
◆ Noise level
Oil-immersed compressor: 55db
Dry-type transformer: 65db
 
◆ Protection grade of enclosure
Transformer room IP23, high voltage room IP33DH
Low pressure chamber IP33DH
Normal use environmental conditions
 
◆ The altitude is not more than l000m.
 
◆ The ambient air temperature is not higher than 40°C and not lower than -25°C.
 
The outdoor wind speed does not exceed 35 m/s.
 
◆ Relative humidity: daily average is not large-95%, monthly average is not more than 90%.
 
Installation location: installed in no fire, explosion hazard, no serious pollution, chemical corrosion and severe vibration of the place.
 
internal structure
 

The switch cabinet has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, bus connection, etc. Mainly suitable for power plants, substations, petrochemical, metallurgical steel rolling, light industry and textile, factories and mining enterprises and residential areas, high-rise buildings and other different places. It mainly includes high-voltage isolating switch and grounding switch, high-voltage load switch, high-voltage automatic coincidence and segmenter, high-voltage operating mechanism, high-voltage explosion-proof distribution device and high-voltage switch cabinet.

Correct Selection of Breaker Breaking Capacity
On the primary system diagram, the selected circuit breaker, indicating the circuit breaker model, rated working voltage and rated working current, must also be selected for the breaking capacity of the circuit breaker. With user drawings, the breaking capacity of the circuit breaker is not selected, which makes it difficult for the manufacturer to carry out engineering design. The breaking capacity selection should be based on the system short-circuit parameters. If the manufacturer does not understand the system short-circuit parameters, it is difficult to make the correct choice. There are also some user drawings, regardless of the system short-circuit parameters, blindly select high-break parameters, resulting in unnecessary waste of funds. The correct choice of breaking capacity is very important, not only to ensure safe operation, but also to consider reducing product costs.


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